Torch not turning off with m5

I am using a hypertherm 65 plasma cutter. Yesterday my plasma cuter was working perfectly now it does not turn off when it is done with its cut. I did a test with the MDI and I put in the m3 command to start then arc and then I put in the m5 command and the arc did not turn off. Do you know what could cause this?

Hear are my configuration files

This is my gcode made with SheetCam

This is my SheetCam post possessor

I attempted to simulate what you reported but M5 seems to work correctly here.

Can you post a step by step example of how you get this issue.